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Pediatric acute-onset neuropsychiatric syndrome (PANS) is the name of a disease that normally begins in childhood. It causes Obsessive-compulsive disorder (OCD) and/or tics. The symptoms begin very suddenly. If it is not treated at the beginning the disease can be there also in adults. The reason for PANS can be a bacteria called "Group A streptococcus" (PANDAS type) or an immunologic reaction to other pathogens like certain bacteria or viruses. (PITANDS type).